package com.ly.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    /**
     * 正常访问
     * @param id
     * @return
     */
    public String paymentInfo(String id) {
        return "线城池："+Thread.currentThread().getName()+" paymentInfo,id："+id+"\t"+"哈哈哈";
    }

    /**
     * 演示8001服务降级fallback，一般服务降级都在客户端(也就是80)
     * 服务降级(服务异常或者逻辑出现异常都可以走兜底方案paymentInfo_TimeOutHandler)
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name="execution.isolation.thread.timeoutInMilliseconds",value="8000")
    })
    public String paymentInfoFalse(String id) {
        //int age = 10/0;
        int timeout = 3;
        try {
            TimeUnit.SECONDS.sleep(timeout);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "线城池："+Thread.currentThread().getName()+" paymentInfoFalse,id："+id+"\t"+"哈哈哈"+"耗时"+timeout+"秒钟";
    }

    public String paymentInfo_TimeOutHandler(String id) {
        return "线城池："+Thread.currentThread().getName()+"系统出现问题，请稍后再试！";
    }
    //以上是服务降级
    /**
     * 服务熔断开始
     */
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),//是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),//请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"),//时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"),//失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(String id)
    {
        if(StringUtils.isBlank(id))
        {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName()+"\t"+"调用成功，流水号: " + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") String id)
    {
        return "id 不能为空，请稍后再试，/(ㄒoㄒ)/~~   id: " +id;
    }


}
